Every Day Counts
Centred Triangular Prime Days
 
Age: 27,544 days
Date of birth
Your 32nd Centred Triangular Prime Day is on
Wednesday
when you will be
29,191 days old

A centred triangular prime is a centred triangular number that is prime.

Centred triangular numbers are of the form (3n2 + 3n + 2) / 2

A centred triangular number is a centred figurate number that represents a triangle with a dot in the centre and all other dots surrounding the centre in successive triangular layers.

The figures for the first four centred triangular numbers are shown below:

Remind me, please


Next Prime Events
Day Age
Event
Days Ahead
Year Age
27 May 2024
27,551
7
75
31 Dec 2026
28,499
955
78
07 Jun 2027
28,657
1,113
78
22 Nov 2028
29,191
1,647
79
23 May 2031
30,103
2,559
82
23 May 2040
33,391
5,847
91
26 Oct 2050
37,199
9,655
101
02 Oct 2056
39,367
11,823
107
03 Sep 2068
43,721
16,177
119
19 Oct 2070
44,497
16,953
121
31 Jan 2082
48,619
21,075
133
28 May 2128
65,537
37,993
179
12 Jul 2223
100,279
72,735
274
29 Jan 2247
108,881
81,337
298
01 Nov 2307
131,071
103,527
358
22 Feb 7766
2,124,679
2,097,135
5817
Ordinal
Day Age
Date
Age
1st
19
09 Jan 1949
0
2nd
31
21 Jan 1949
0
3rd
109
09 Apr 1949
0
4th
199
08 Jul 1949
0
5th
409
03 Feb 1950
1
6th
571
15 Jul 1950
1
7th
631
13 Sep 1950
1
8th
829
30 Mar 1951
2
9th
1,489
18 Jan 1953
4
10th
1,999
12 Jun 1954
5
11th
2,341
20 May 1955
6
12th
2,971
08 Feb 1957
8
13th
3,529
20 Aug 1958
9
14th
4,621
16 Aug 1961
12
15th
4,789
31 Jan 1962
13
16th
7,039
30 Mar 1968
19
17th
7,669
20 Dec 1969
20
18th
8,779
03 Jan 1973
24
19th
9,721
03 Aug 1975
26
20th
10,459
10 Aug 1977
28
21st
10,711
19 Apr 1978
29
22nd
13,681
06 Jun 1986
37
23rd
14,851
19 Aug 1989
40
24th
16,069
19 Dec 1992
43
25th
16,381
27 Oct 1993
44
26th
17,659
27 Apr 1997
48
27th
20,011
05 Oct 2003
54
28th
20,359
17 Sep 2004
55
29th
23,251
18 Aug 2012
63
30th
25,939
28 Dec 2019
71
31st
27,541
17 May 2024
75
32nd
29,191
22 Nov 2028
79
1
33rd
29,611
16 Jan 2030
81
34th
31,321
22 Sep 2034
85
35th
34,429
27 Mar 2043
94
36th
36,739
23 Jul 2049
100
37th
40,099
04 Oct 2058
109
38th
40,591
08 Feb 2060
111
39th
42,589
29 Jul 2065
116